Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-09-22
Astrophys.J.664:L5-L8,2007
Astronomy and Astrophysics
Astrophysics
11 pages, 3 tables, 1 figures
Scientific paper
10.1086/520533
The collapse of a massive star is believed to be the most probable progenitor of a long GRB. Such a star is expected to modify its environment by stellar wind. The effect of such a circum-stellar wind medium is expected to be seen in the evolution of a GRB afterglow, but has so far not been conclusively found. We claim that a signature of wind to constant density medium transition of circum-burst medium is visible in the afterglow of GRB 050319. Along with the optical observations of the afterglow of GRB 050319 we present a model for the multiband afterglow of GRB 050319. We show that the break seen in optical light curve at $\sim$ 0.02 day could be explained as being due to wind to constant density medium transition of circum-burst medium, in which case, to our knowledge, this could be the first ever detection of such a transition at any given frequency band. Detection of such a transition could also serve as a confirmation of massive star collapse scenario for GRB progenitors, independent of supernova signatures.
Kamble Atish
Misra Kuntal
Resmi Lekshmi
No associations
LandOfFree
Observations of the Optical Afterglow of GRB 050319 : Wind to ISM transition in view does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observations of the Optical Afterglow of GRB 050319 : Wind to ISM transition in view, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observations of the Optical Afterglow of GRB 050319 : Wind to ISM transition in view will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-543992